Computer Science – Numerical Analysis
Scientific paper
Sep 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002astl...28..632b&link_type=abstract
Astronomy Letters, vol. 28, pp. 632-640 (2002)
Computer Science
Numerical Analysis
2
Bow Waves, Particle Acceleration, Ions, Shock Fronts, Solar Terrestrial Interactions, Energy Spectra, Numerical Analysis, Time Dependence, Alfven Waves Generation, Nonlinear Alfven Waves Interaction
Scientific paper
We investigate the role of nonlinear Alfven-wave interaction in the diffusive shock acceleration of solar-wind ions at the Earth's bow shock. Allowance for the nonlinear wave interaction through induced scattering and two-quanta absorption at plasma parameters beta <~ 0.1 is shown to limit the Alfven-wave amplitude delta B to delta B <~ B, whereas the quasi-linear approach predicts the generation of waves with amplitudes much larger than the diffusive shock magnetic field strength B. The nonlinear interaction results in spectral wave energy transfer to lower frequencies, which yields a significant increase in the particle acceleration rate.
Berezhko Evgeny G.
Petukhov S. I.
Taneev S. N.
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